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A 2TB SSD costs around 400-500USD. That's not exactly out of the realm of possibility for a small office.

floatboth 9y ago
Sure, but it's a rather high price for just faster storage. And like… 2 TB of cache is a bit high for SOHO NAS, and if you go full SSD for storage, you'd want two of them for a mirror and that's 1000 USD already…
- loeg 9y ago
  Probably better to spend $150 on SSD cache and $150 on RAM cache than to spend $300 on RAM and $0 on SSD, though. Or the other extreme.
- dragontamer 9y ago
  And we spend what? $200 upgrading from an i3 to an i7 for like... 30% faster CPU performance? Upgrading $100 hard drive to $400 SSD results in like, 500% improvements in storage speed. If you have any storage-related task... such as video editing, handling of large datasets and whatnot... the SSD will have a far bigger impact on your productivity than any CPU upgrade.
ioquatix 9y ago
I've got 6x 4TB WD RED in a ZFS RAID10 (3x2 mirrors). I get about 500Mbytes/s read and write, on average. You start getting into 10GbE territory pretty easily with even consumer drives and ZFS. With SSDs, you'd quickly need trunked 10GbE if you want to fully saturate your network - in addition to that consider the client requirements - e.g. each workstation with 10GbE or 1GbE. You'd have to have some pretty decent requirements to necessitate a ZFS RAID10 with [NVMe] SSDs.
- hvidgaard 9y ago
  The benefit of SSD is not the raw sequential transfer. That is easy to max out with spinning platters. You want SSD for random access, it's significantly better at that.
  - ioquatix 9y ago
    The ARC (and L2ARC on an SSD) give you the best possible IOPs for read operations given the limits of the underlying hardware. Asynchronous write operations are cached to memory before being written to disk, often sequentially. For synchronous writes, you should use a ZIL on a mirrored SSD.
koffiezet 9y ago
A 2TB drive for 400 or 500 USD? Cheapest ok-ones (samsung EVO) I can find are 700 USD, and then we're not really talking about drives you might actually consider putting in a storage pool used to store critical data. And if you want 6 or 7 of those puppies, in a non-diy server through a vendor which offers support, 10GE and with enough ECC and CPU to handle that IO load/throughput, you're in for a treat :)

Sure, but it's a rather high price for just faster storage. And like… 2 TB of cache is a bit high for SOHO NAS, and if you go full SSD for storage, you'd want two of them for a mirror and that's 1000 USD already…

loeg 9y ago
Probably better to spend $150 on SSD cache and $150 on RAM cache than to spend $300 on RAM and $0 on SSD, though. Or the other extreme.
dragontamer 9y ago
And we spend what? $200 upgrading from an i3 to an i7 for like... 30% faster CPU performance? Upgrading $100 hard drive to $400 SSD results in like, 500% improvements in storage speed. If you have any storage-related task... such as video editing, handling of large datasets and whatnot... the SSD will have a far bigger impact on your productivity than any CPU upgrade.

ioquatix 9y ago

I've got 6x 4TB WD RED in a ZFS RAID10 (3x2 mirrors). I get about 500Mbytes/s read and write, on average. You start getting into 10GbE territory pretty easily with even consumer drives and ZFS. With SSDs, you'd quickly need trunked 10GbE if you want to fully saturate your network - in addition to that consider the client requirements - e.g. each workstation with 10GbE or 1GbE. You'd have to have some pretty decent requirements to necessitate a ZFS RAID10 with [NVMe] SSDs.

hvidgaard 9y ago
The benefit of SSD is not the raw sequential transfer. That is easy to max out with spinning platters. You want SSD for random access, it's significantly better at that.
- ioquatix 9y ago
  The ARC (and L2ARC on an SSD) give you the best possible IOPs for read operations given the limits of the underlying hardware. Asynchronous write operations are cached to memory before being written to disk, often sequentially. For synchronous writes, you should use a ZIL on a mirrored SSD.

koffiezet 9y ago

A 2TB drive for 400 or 500 USD? Cheapest ok-ones (samsung EVO) I can find are 700 USD, and then we're not really talking about drives you might actually consider putting in a storage pool used to store critical data. And if you want 6 or 7 of those puppies, in a non-diy server through a vendor which offers support, 10GE and with enough ECC and CPU to handle that IO load/throughput, you're in for a treat :)